FYI -
Beware of automatic approval of updates for Microsoft. Check out this discussion on the MS WSUS forum
WSUS suddenly installed Skype on 06/27/12
Microsoft did expire their Skype update about an hour ago. WSUS servers should pick up that expiration at their next synchronization.
For a reliable Skype update, I would suggest using the SolarWinds Skype packages for v5.10 which were released on June 15th.
I agree Lawrence. Much better control with Patch Manager for Skype updates.